I sometimes put mine in my post-workout shake.
My PWO shake consists of:
1 Scoop Whey protein
2 scoops (60g) of Dextrose.
As Biotest doesn't make dextrose I don't think they should have a problem in me saying that you can purchase your dextrose from other sites.
I recommend a good protein though, for that you can hitup the Biotest guys.
Quality is important.
NOW Foods makes the dextrose I use.